Like more than one of them
25 games close to two or more of Halo: Spartan Assault, Garry's Mod and Left 4 Dead 2
SCP: Secret Laboratory
Left 4 Dead 2, but free to play
Loved · 91%FPS · Survival HorrorAlso like Garry's Mod
SAS: Zombie Assault 4
Halo: Spartan Assault, but with zombies, and three times the hours
Liked · 86%Top-Down Shooter · Top-DownAlso like Left 4 Dead 2
Alien Swarm
Halo: Spartan Assault, but free to play, and even better loved
Loved · 95%Top-Down Shooter · AliensAlso like Left 4 Dead 2
Evolve Stage 2
Left 4 Dead 2, but free to play, and sci-fi
Mixed · 70%FPS · Team-BasedAlso like Garry's Mod
No More Room in Hell
Left 4 Dead 2, but free to play, and half the hours
Loved · 90%Zombies · SurvivalAlso like Garry's Mod
STAR WARS Battlefront II
Halo: Spartan Assault, but co-op, and four times the hours
Liked · 88%Space · Sci-fiAlso like Garry's Mod and Left 4 Dead 2
Ravenfield
Garry's Mod, but single-player, and a third of the hours
Loved · 97%Sandbox · FPSAlso like Left 4 Dead 2
Call of Duty: Black Ops II
Left 4 Dead 2, but a quarter of the hours, and more divisive
Liked · 86%FPS · Team-BasedAlso like Garry's Mod
PlanetSide 2
Garry's Mod, but free to play, and an MMO
Liked · 80%FPS · ShooterAlso like Left 4 Dead 2
Space Hulk: Deathwing - Enhanced Edition
Garry's Mod, but a tenth of the hours, and more divisive
Mixed · 72%FPS · Online Co-OpAlso like Halo: Spartan Assault and Left 4 Dead 2
Counter-Strike Nexon
Left 4 Dead 2, but PvP, and more divisive
Mixed · 67%Zombies · FPSAlso like Garry's Mod
Serious Sam HD: The First Encounter
Garry's Mod, but a boomer shooter, and a tenth of the hours
Loved · 93%FPS · ComedyAlso like Left 4 Dead 2
Natural Selection 2
Halo: Spartan Assault, but a real-time strategy game, and nine times the hours
Liked · 85%Aliens · Sci-fiAlso like Left 4 Dead 2
Half-Life: Alyx
Halo: Spartan Assault, but in VR, and horror
Loved · 98%Aliens · ShooterAlso like Left 4 Dead 2
Aliens: Colonial Marines
Halo: Spartan Assault, but three times the hours, and more divisive
Divisive · 62%Aliens · Sci-fiAlso like Left 4 Dead 2 and Garry's Mod
Serious Sam 3: BFE
Garry's Mod, but a boomer shooter, and gorier
Liked · 88%FPS · ComedyAlso like Left 4 Dead 2
Sanctum 2
Halo: Spartan Assault, but a tower defense game, and twice the hours
Loved · 90%Sci-fi · AliensAlso like Garry's Mod and Left 4 Dead 2
Half-Life 2
Garry's Mod, but story-rich, and a quarter of the hours
Loved · 98%FPS · PhysicsAlso like Left 4 Dead 2
Splitgate
Garry's Mod, but free to play, and an arena shooter
Loved · 91%FPS · PhysicsAlso like Left 4 Dead 2
More like Halo: Spartan Assault
2 games closest to Halo: Spartan Assault of your picks
HELLDIVERS
Halo: Spartan Assault, but co-op, and five times the hours
Loved · 90%Top-Down Shooter · Twin Stick Shooter
More like Garry's Mod
3 games closest to Garry's Mod of your picks
Scrap Mechanic
Garry's Mod, but a survival crafting game, and with base building
Loved · 92%Building · Physics
How this list is made
Each game is measured against each of your picks the way a games-like list measures it: the Steam community tags, Steam genres and IGDB themes they share, each counting for more the fewer games carry it. A game's place is how alike it is to your picks together, as a share of each pick's best match, so one alike to two of them comes before one alike to just one. It must be close to at least one of them, as close as it would have to be on that game's own list.
None of your picks is on the list, nor a second release of one, nor a game of their own series. Up to 30 games are shown. Under each name, the kinds it shares with the pick it is closest to, and how it differs from that pick.